Question

17. What are the critical values ?²L and ?²R that corresponds to a 98% confidence level and a sample size of 20? 8.260, 37.566 7.633, 36.191 6.844, 38.582 8.907, 32.852 18. Solve the problem. Find the chi-square value ?²L corresponding to a sample size of 23 and a confidence level of 90%. 12.338 33.924 1.69 16.013 19. Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation ?. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation. Heights of mature White Pine trees: 99% confidence; n = 29, x? = 65 ft , s = 8.4 ft 8.27 ft < ? < 8.53 ft 4.23 ft < ? < 10.47 ft 6.22 ft < ? < 12.59 ft 5.73 ft < ? < 10.07 ft 20. Solve the problem. Find the critical value ?²L corresponding to a sample size of 24 and a confidence level of 95%. 38.076 11.689 13.091 35.172

          17. What are the critical values ?²L and ?²R that corresponds to a 98% confidence level and a sample size of 20?
8.260, 37.566
7.633, 36.191
6.844, 38.582
8.907, 32.852

18. Solve the problem.
Find the chi-square value ?²L corresponding to a sample size of 23 and a confidence level of 90%.
12.338
33.924
1.69
16.013

19. Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation ?. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation.
Heights of mature White Pine trees: 99% confidence; n = 29, x? = 65 ft , s = 8.4 ft
8.27 ft < ? < 8.53 ft
4.23 ft < ? < 10.47 ft
6.22 ft < ? < 12.59 ft
5.73 ft < ? < 10.07 ft

20. Solve the problem.
Find the critical value ?²L corresponding to a sample size of 24 and a confidence level of 95%.
38.076
11.689
13.091
35.172

17. What are the critical values ?²L and ?²R that corresponds to a 98% confidence level and a sample size of 20?
8.260, 37.566
7.633, 36.191
6.844, 38.582
8.907, 32.852

18. Solve the problem.
Find the chi-square value ?²L corresponding to a sample size of 23 and a confidence level of 90%.
12.338
33.924
1.69
16.013

19. Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation ?. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation.
Heights of mature White Pine trees: 99% confidence; n = 29, x? = 65 ft , s = 8.4 ft
8.27 ft < ? < 8.53 ft
4.23 ft < ? < 10.47 ft
6.22 ft < ? < 12.59 ft
5.73 ft < ? < 10.07 ft

20. Solve the problem.
Find the critical value ?²L corresponding to a sample size of 24 and a confidence level of 95%.
38.076
11.689
13.091
35.172

Added by Gema C.

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